Large-span steel beam hoisting construction method

The invention relates to a large-span steel beam hoisting construction method. The large-span steel beam hoisting construction method comprises the steps that a lug plate is positioned to the elevation position of a steel beam to be hoisted; the steel beam penetrates through a plurality of inhaul cables for guiding, wherein the horizontal elevation of the corresponding elevation position of each inhaul cable is sleeved with a cable core; a plurality of winches used for hoisting the steel beam are arranged on the top layer of a floor at intervals, and the winches located on the two sides of the middle winch in the middle are symmetrically arranged; the winches are gradually unwound from the middle to the two sides, and the winches are made to rise by a preset height every time; when the steel beam is hoisted to the cable core close to the corresponding horizontal elevation of the inhaul cables, the horizontal state of the steel beam is corrected according to the horizontal elevation; the inhaul cables and the